Title :
On-line determination of reduced-order models of linear systems via the moving discrete Fourier transform (MDFT)
Author_Institution :
Dept. of Electr. Eng., Louisville Univ., KY, USA
Abstract :
A method for online determination of reduced-order models (ROM) of stable linear systems is presented. The identification method utilizes the moving discrete Fourier transform (MDFT) to monitor continuously the frequency-domain profile of the system input and output. The input and output MDFTs are used to determine the effect of the system on n (for an nth-order ROM) sinusoidal components in these signals, although the plant input and output need not actually be sinusoidal. The MDFT is computationally more efficient than standard FFT algorithms, when the DFT of an evolving time signal is desired
Keywords :
Fourier transforms; control system analysis; identification; linear systems; frequency-domain profile; identification method; linear systems; moving discrete Fourier transform; online determination; reduced-order models; stable systems; system input; system output; Adaptive control; Discrete Fourier transforms; Fourier transforms; Frequency; Linear systems; Monitoring; Polynomials; Read only memory; Reduced order systems; Transfer functions;
Conference_Titel :
Circuits and Systems, 1989., IEEE International Symposium on
Conference_Location :
Portland, OR
DOI :
10.1109/ISCAS.1989.100715
